JPH0346769Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is installed in the middle of a liquid transfer tube that constitutes a medical device such as an extracorporeal circulation circuit or a blood transfusion set, and is used for mixed injection of drug solutions, injection of air, or air injection. This invention relates to improvement of a co-injection part used when performing extraction, etc.

[Prior Art] FIG. 3 is a partially cutaway sectional view showing an example of a currently used co-infusion unit.

The mixed injection section 11 includes a connecting member 14 having a connecting part 13 between an opening 12 and a liquid transfer tube 16, a mixed injection rubber button 15 inserted into the opening 12, and a cover 17 that covers the mixed injection rubber button 15. It is configured.

The connection part 13 has a liquid transfer tube 16
is attached with adhesive or the like.

The connecting member 14 is made of transparent synthetic resin, while the cover 17 is made of synthetic resin colored red, blue, or the like.

In use, as shown in FIG. 4, the tip 20 of the drug solution injection needle 19 is inserted into the mixed injection rubber button 15 and placed at the opening 12 or the drug solution passage 18, and the drug solution is mixedly injected. Ta.

[Problems with the prior art] Usually, the rubber button 15 is made of silicone rubber that is transparent enough to confirm the puncture position of the needle, but the cover 17 of the co-injection part 11 is made of colored synthetic resin. As a result, the following problems occurred when actually injecting the drug solution.

Connect the tip 20 of the drug injection needle 19 to the mixed injection rubber button 1
5, until the tip 20 appears in the opening 12, the position of the puncture situation cannot be confirmed at all times. There had been an accident in which someone accidentally pierced a wall.

[B] Since the mixed injection rubber button is made of elastic silicone rubber, etc., once the needle is inserted, the needle will smoothly penetrate into the inside of the mixed injection rubber button even with a weak force.

Therefore, unless one keeps an eye on the exit position of the tip of the needle, an accident like [a] may occur, making it difficult to perform the operation.

[C] In addition, the mixed injection part formed in the air trap (not shown) provided in the middle of the extracorporeal circulation circuit is used not only for mixed injection of drug solutions but also for air removal, air injection, etc. There were cases where the needle was punctured diagonally because it was not possible to check the needle puncture status inside the mixed injection rubber button. At this time, there is a risk that the needle may pierce the side wall of the air trap and the blood inside may leak, or air may enter the blood from the outside and eventually enter the patient's body, which is a serious risk. It was causing an accident.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a cover made of a synthetic resin that is transparent or transparent enough to confirm the puncture position of the needle. The object of the present invention is to provide a mixed injection part that is formed by being covered with a mixed injection rubber button that is transparent or transparent enough to confirm the puncture position of a needle.

[Operation] With the above configuration, the position of the injection needle puncturing the mixed injection rubber button can be confirmed from beginning to end, making it easier to perform the actual operation.

[Example] FIG. 1 shows an example of the mixed injection section of the present invention.
A partially cutaway sectional view is shown.

The mixed injection unit 1 is composed of a cover 7, a mixed injection rubber button 5, and a connecting member 4 having an opening 2 at the top and connecting portions 3 for liquid transfer tubes at both ends.

That is, a mixed injection rubber button 5 made of silicone rubber that is transparent enough to confirm the needle puncture position is inserted into the opening 2 of the connecting member 4, and a transparent synthetic resin (or a transparent synthetic resin or a rubber button to mark the needle puncture position) is inserted into the opening 2 of the connecting member 4. A cover 7 made of a synthetic resin (synthetic resin with sufficient transparency for confirmation) is attached.

These synthetic resins are polyvinyl chloride, polypropylene, polycarbonate-based synthetic resins that do not contain conventionally added pigments, that is, titanium oxide (titanium white), or the synthetic resins are appropriately colored with a predetermined amount of red or blue. It is made by adding an agent.

Reference numeral 6 denotes a liquid transfer tube, which is attached to the connecting portion 3 of the connecting member 4 with adhesive or the like.

Next, how to use the present invention will be explained with reference to FIG.

Connect the tip 10 of the drug solution injection needle 9 to the mixed injection rubber button 5.
The drug solution injection needle 9 is inserted into the mixed injection rubber through the transparent cover 7 (or a cover transparent enough to allow confirmation of the puncture position of the needle) while observing the tip position 10. Push button 5 toward the bottom.

Once it is confirmed that the tip 10 of the drug solution injection needle 9 has reached the opening 2 or the liquid passage 8, the needle is stopped and the drug solution is injected.

As described above, the position of the tip 10 of the drug solution injection needle 9 inside the mixed injection rubber button 5 can be confirmed from beginning to end.

The shape of the co-injection part described above shows one example, and it is clear that the present invention can be used in any shape as long as the co-injection part consists of a cover, a co-injection rubber button, and a connecting member. be.

[Effects] As described above, in this invention, the position of the tip of the liquid injection needle inside the mixed injection rubber button can be confirmed step by step from the time of puncturing to the time of penetration, which improves the operability of the mixed injection part itself. This is an excellent device that has the advantage of being able to prevent, to a high degree of probability, accidents such as the injection needle penetrating the bottom of the connecting member or the side wall of the air trap.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway sectional view of the co-injection part of the present invention;
Fig. 2 is a usage state diagram of the co-injection part of the present invention, Fig. 3 is a partially cutaway sectional view of the conventional co-injection part, and Fig. 4 is:
A usage state diagram of a conventional co-injection unit is shown. In the figure, 1 is a mixed injection part, 2 is an opening, 3 is a connection part,
4 is a connection member, 5 is a co-injection rubber button, 6 is a liquid transfer tube, 7 is a cover, 8 is a liquid passage, 9 is a drug solution injection needle, and 10 is the tip of the drug solution injection needle.

Claims (1)

[Scope of utility model registration request] In the co-injection part provided in the middle of a liquid transfer tube that constitutes a medical device such as an extracorporeal circulation circuit or a blood transfusion set, a cover made of synthetic resin that is transparent or transparent enough to confirm the needle puncture position is installed as a connecting member. 1. A co-injection part, characterized in that it is formed by being covered with a co-injection rubber button that is transparent or transparent enough to allow confirmation of the puncture position of a needle, which is inserted into the opening of the co-injection part.